6E 5239 then SG 622 at Mumbai
Kolkata → Mumbai → Varanasi
Timetable, Mumbai time
12:106E 5239 from Kolkata at the gate
10:40SG 622 to Varanasi leaves the gate
22 h 30 apart on the timetable, overnight
SG 622 leaves 22 h 30 after 6E 5239 arrives on the timetable: more than half a day, so not a connection we count.